Just recently broke mine unfortunetly, and thought about using these forums for some advise, I play rock/alternate and I like a good studio sort of sound, I use a fusion kit so it will have to be 20". Dont wanna spend more than 60 quid really.

Normally I'd recommend a Remo PS3, but if you're after a "studio" sound I'll assume your after something with a sharp thuddy attack and no sustain. Sounds like you need to try one of the EMAD's by Evans.

I would start with a more open head and muffle accordingly. Another good choice is Aquarian SK1. It is a bit more muffled than the ps3.
My current combo is Aquarian sk1 with ps3 reso (5" port hole) with a folded towel inside.
It's giving me the perfect amount of sustain.
Definitely go for a ps3 style reso no matter what you get as batter.

Does Evans even offer a 26" bass drum head that DOESN'T have a muffle ring in it?
Just a plain 26" coated G1?

We don't do a 26" G1 simply because there really isn't the demand for a wide-open single-ply bass head without the EQ overtone ring. The EQ4 still offers an open, fully resonant tone that can be tune super low without sounding boxy.